The best thing I have (for the winter time) is a floatation suit (designed for fishing
) It's essentially a bib and brace but is thermal lined and has big pockets
It's fab and lets me go out and about whatever the weather without getting cold.
And fingerless gloves for winter - they seem to work better for me that whole gloves for some bizarre reason.
Wellies - pfft, with my fat calves I've just about given up
I've got a short leg pair which are the most uncomfortable things I've ever worn, I used to wear my old Doc Marten boots - they were great
But after 9 years the soles are coming away from the shoes and have no grip, so now they only get used on dry days
And a hat - proper wooly, well fitting (so the gales don't blow it off) if my head, hands and feet are warm it's much less miserable when the weather is bad